WO2020059586A1

WO2020059586A1 - Motor and compressor

Info

Publication number: WO2020059586A1
Application number: PCT/JP2019/035652
Authority: WO
Inventors: 公興長谷川
Original assignee: 株式会社富士通ゼネラル
Priority date: 2018-09-18
Filing date: 2019-09-11
Publication date: 2020-03-26
Also published as: JP6729651B2; CN112714993A; US20220045569A1; US11955855B2; JP2020048303A

Abstract

A motor, provided with a rotor and a stator for generating a magnetic field for causing the rotor to rotate. The stator has: a plurality of teeth; a plurality of winding wires having a winding part wound around each of the plurality of teeth, a neutral wire provided on one side of the winding part, and a power supply wire provided on the other side of the winding part; and a plurality of neutral points at which the plurality of neutral wires are electrically connected by a connection terminal. The plurality of neutral wires have a plurality of first fixed parts fixed to each other at positions on the winding part side of the plurality of neutral points, and a second fixed part at which the plurality of neutral wires are fixed to each other between the plurality of first fixed parts and the plurality of neutral points.

Description

Motor and compressor

The present invention relates to a motor and a compressor.

For example, the compressor includes a motor for driving a compression unit that compresses the refrigerant. The motor includes a rotor provided with a permanent magnet and a stator that rotates the rotor by generating a rotating magnetic field, and transmits rotational power to a compression unit via a shaft fixed to the rotor. The stator has a plurality of teeth, and a winding is formed by winding an electric wire around each of the plurality of teeth. In the winding, each of the plurality of winding portions wound around each tooth is star-connected (star-shaped connection), and one end of the winding portion wound around each tooth is connected to a power source, and the winding is performed. The other end (referred to as a neutral line) of the section is connected to a neutral point.

JP 2010-166643 A

For example, in the case of a nine-slot type three-phase motor, in order to connect each neutral wire at a neutral point, there is a type in which nine neutral wires are bundled together and soldered. When soldering, it is necessary to peel off the insulating film of the electric wire, and the workability of assembling the motor is low. For this reason, it has been proposed to bond a neutral wire by crimping via a connection terminal using a caulking machine instead of bonding by soldering.

When the neutral wires are joined by crimping, when four or more neutral wires are bundled, it becomes difficult to properly join each neutral wire, and it is desirable to crimp the neutral wires into three pieces each. . Therefore, when nine neutral lines are connected at a neutral point, three neutral lines are considered as one set, and a bundle of three neutral lines is generated. Therefore, in the motor assembling process, three neutral wires are connected in combination for each of three predetermined neutral wires, and three sets of neutral wires are handled. Therefore, handling of nine neutral wires becomes complicated, and assembling is performed. The workability of the motor is reduced, and the connection of the motor varies.

技術 The disclosed technology has been made in view of the above, and has as its object to provide a motor and a compressor capable of improving workability in assembling a motor.

One mode of the motor disclosed in the present application includes a rotor and a stator that generates a magnetic field for rotating the rotor, the stator includes a plurality of teeth, and a winding portion wound around each of the plurality of teeth, A plurality of windings having a neutral wire provided on one end side of the winding portion and a power supply wire provided on the other end side of the winding portion, and a plurality of neutral wires are electrically connected via a connection member. A plurality of neutral points, the plurality of neutral lines being connected to each other at a position closer to the winding part than the plurality of neutral points; And a second fixing portion in which a plurality of neutral lines are fixed to each other from the first fixing portion to the plurality of neutral points.

According to one aspect of the motor disclosed in the present application, the workability of assembling the motor can be improved.

FIG. 1 is a longitudinal sectional view illustrating a compressor including a three-phase motor according to an embodiment. FIG. 2 is a plan view showing the three-phase motor of the embodiment from the upper insulator side. FIG. 3 is a bottom view showing the stator core in the embodiment. FIG. 4 is a perspective view showing the lower insulator in the embodiment. FIG. 5 is a bottom view showing the stator according to the embodiment. FIG. 6 is a developed view showing a plurality of windings in the embodiment. FIG. 7 is a connection diagram illustrating a connection state of a plurality of windings in the example. FIG. 8 is a perspective view illustrating a state before connection of the first splice terminal and the electric wire in the example. FIG. 9 is a flowchart for explaining a stator manufacturing process in the embodiment. FIG. 10A is a plan view showing a state where nine neutral wires are drawn out in the embodiment. FIG. 10B is a plan view illustrating a state in which the first fixing portion is formed by three neutral wires out of nine neutral wires in the example. FIG. 10C is a plan view illustrating a state in which the first fixing portion is formed by three neutral lines of the remaining six neutral lines in the example. FIG. 10D is a plan view illustrating a state in which the first fixing portion is formed by the remaining three neutral wires in the example. FIG. 11A is a side view showing a state in which three sets of neutral wires have the same length in the embodiment. FIG. 11B is a side view showing a state in which three sets of neutral wires are joined by crimping in the example. FIG. 11C is a side view showing a state where three sets of neutral wires are bundled into one bundle in the example. FIG. 11D is a side view showing a state where the neutral wires bundled together are covered with an insulating tube in the example.

Hereinafter, embodiments of the motor disclosed in the present application will be described in detail with reference to the drawings. Note that the motor disclosed in the present application is not limited by the following embodiments.

FIG. 1 is a longitudinal sectional view showing a compressor including the three-phase motor of the embodiment. As shown in FIG. 1, the compressor 1 is a so-called rotary compressor, and includes a container 2, a shaft 3, a compression unit 5, and a three-phase motor 6. The container 2 forms a closed internal space 7. The internal space 7 is formed in a substantially cylindrical shape. The container 2 is formed such that the central axis of a cylinder forming the internal space 7 is parallel to the vertical direction when the container 2 is placed vertically on a horizontal plane. An oil reservoir 8 is formed in the lower part of the internal space 7 in the container 2. Refrigeration oil, which is a lubricating oil for lubricating the compression unit 5, is stored in the oil reservoir 8. A suction pipe 11 for sucking the refrigerant and a discharge pipe 12 for discharging the compressed refrigerant are connected to the container 2. The shaft 3 as a rotation shaft is formed in a rod shape, and is disposed in the internal space 7 of the container 2 such that one end is disposed in the oil reservoir 8. The shaft 3 is supported by the container 2 so as to be rotatable about a central axis of a column forming the internal space 7. The shaft 3 supplies the refrigerating machine oil stored in the oil sump 8 to the compression unit 5 by rotating.

The compression unit 5 is disposed below the internal space 7 and above the oil reservoir 8. The compressor 1 further includes an upper muffler cover 14 and a lower muffler cover 15. The upper muffler cover 14 is disposed above the compression section 5 in the internal space 7. The upper muffler cover 14 has an upper muffler chamber 16 formed therein. The lower muffler cover 15 is provided below the compression section 5 in the internal space 7 and is located above the oil reservoir 8. The lower muffler cover 15 has a lower muffler chamber 17 formed therein. The lower muffler chamber 17 communicates with the upper muffler chamber 16 via a communication passage (not shown) formed in the compression section 5. A compressed refrigerant discharge hole 18 is formed between the upper muffler cover 14 and the shaft 3, and the upper muffler chamber 16 communicates with the internal space 7 via the compressed refrigerant discharge hole 18.

The compression unit 5 compresses the refrigerant supplied from the suction pipe 11 as the shaft 3 rotates, and supplies the compressed refrigerant to the upper muffler chamber 16 and the lower muffler chamber 17. The refrigerant has compatibility with the refrigerating machine oil. The three-phase motor 6 is arranged above the compression section 5 in the internal space 7.

FIG. 2 is a plan view showing the three-phase motor 6 in the embodiment from the upper insulator side. As shown in FIGS. 1 and 2, the three-phase motor 6 includes a rotor 21 and a stator 22. The rotor 21 is formed in a cylindrical shape by laminating a plurality of silicon steel thin plates (magnetic bodies), and is integrated by a plurality of rivets 9. At the center of the rotor 21, the shaft 3 is inserted and fixed. At the rotor 21, six slit-shaped magnet embedding holes 10 a are formed so as to form hexagonal sides around the shaft 3. I have. The magnet embedding holes 10 a are formed at predetermined intervals in the circumferential direction of the rotor 21. A plate-shaped permanent magnet 10b is embedded in the magnet embedding hole 10a.

The stator 22 is formed in a substantially cylindrical shape, is disposed so as to surround the rotor 21, and is fixed to the container 2. The stator 22 includes a stator core 23, an upper insulator 24 and a lower insulator 25, and a plurality of windings 46. The upper insulator 24 is fixed to an upper portion of the stator core 23. The lower insulator 25 is fixed to a lower portion of the stator core 23. The upper insulator 24 and the lower insulator 25 are examples of an insulating portion that insulates the stator core 23 and the winding 46.

FIG. 3 is a bottom view showing the stator core 23 in the embodiment. The stator core 23 is formed, for example, by laminating a plurality of plates made of a soft magnetic material exemplified by a silicon steel plate, and as shown in FIG. 3, a yoke portion 31 and a plurality of stator core teeth portions 32-1 to 32-32. -9. The yoke part 31 is formed in a substantially cylindrical shape. The first stator core teeth portion 32-1 of the plurality of stator core teeth portions 32-1 to 32-9 is formed in a substantially columnar shape. The first stator core teeth portion 32-1 has one end formed continuously with the inner peripheral surface of the yoke portion 31, that is, formed so as to protrude from the inner peripheral surface of the yoke portion 31. The stator core teeth of the plurality of stator core teeth 32-1 to 32-9 that are different from the first stator core teeth 32-1 are formed in a substantially columnar shape similarly to the first stator core teeth 32-1. And protrudes from the inner peripheral surface of the yoke portion 31. The plurality of stator core teeth 32-1 to 32-9 are further formed on the inner peripheral surface of the yoke 31 at regular intervals of 40 degrees.

FIG. 4 is a perspective view showing the lower insulator 25 in the embodiment. The lower insulator 25 is formed of an insulator exemplified by polybutylene terephthalate resin (PBT). As shown in FIG. 4, an outer peripheral wall portion 41, a plurality of insulator teeth portions 42-1 to 42-9, and And a plurality of flanges 43-1 to 43-9. The outer peripheral wall portion 41 is formed in a substantially cylindrical shape. The outer peripheral wall 41 has a plurality of slits 44 formed therein. The first insulator tooth portion 42-1 of the plurality of insulator tooth portions 42-1 to 42-9 is formed in a columnar shape having a substantially semicircular cross section. The first insulator tooth portion 42-1 has one end formed continuously with the inner peripheral surface of the outer peripheral wall portion 41, that is, formed so as to protrude from the inner peripheral surface of the outer peripheral wall portion 41. The insulator tooth portion different from the first insulator tooth portion 42-1 among the plurality of insulator tooth portions 42-1 to 42-9 is also formed in a columnar shape, and like the first insulator tooth portion 42-1. It is formed so as to protrude from the inner peripheral surface of the outer peripheral wall portion 41. The plurality of insulator teeth portions 42-1 to 42-9 are formed on the inner peripheral surface of the outer peripheral wall portion 41 at regular intervals of 40 degrees.

The plurality of flanges 43-1 to 43-9 correspond to the plurality of insulator teeth 42-1 to 42-9, and are each formed in a substantially semicircular plate shape. The first flange portion 43-1 corresponding to the first insulator tooth portion 42-1 of the plurality of flange portions 43-1 to 43-9 is formed continuously with the other end of the first insulator tooth portion 42-1. Have been. Similarly to the first flange portion 43-1, the plurality of insulator teeth portions 42-1 to 42-9 of the plurality of flange portions 43-1 to 43-9 are different from the first flange portion 43-1. Is formed continuously with the other end of

The upper insulator 24 is formed similarly to the lower insulator 25. That is, the upper insulator 24 is formed of an insulator and has an outer peripheral wall portion 41, a plurality of insulator teeth portions 42-1 to 42-9, and a plurality of flange portions 43-1 to 43-9. doing.

FIG. 5 is a bottom view showing the stator 22 in the embodiment. As shown in FIG. 5, a plurality of windings 46 are wound around the plurality of stator core teeth 32-1 to 32-9 of the stator core 23, respectively. Each of the stator core teeth 32-1 to 32-9 has a winding 45 formed by a winding 46. The three-phase motor in the embodiment is a concentrated winding type motor having 6 poles and 9 slots (see FIG. 2). The plurality of windings 46 include a plurality of U-phase windings 46-U1 to 46-U3, a plurality of V-phase windings 46-V1 to 46-V3, and a plurality of W-phase windings 46-W1 to 46-W3. And

The U-phase winding has a plurality of windings. Specifically, a first U-phase winding 46-U1, a second U-phase winding 46-U2, and a third U-phase winding 46-U3 are provided as U-phase windings. The first U-phase winding 46-U1 is wound around the fourth stator core teeth portion 32-4. The second U-phase winding 46-U2 is wound around the seventh stator core teeth 32-7. The third U-phase winding 46-U3 is wound around the first stator core teeth 32-1.

The V-phase winding has a plurality of windings. Specifically, a V-phase winding includes a first V-phase winding 46-V1, a second V-phase winding 46-V2, and a third V-phase winding 46-V3. The first V-phase winding 46-V1 is wound around the eighth stator core teeth portion 32-8. The second V-phase winding 46-V2 is wound around the second stator core teeth portion 32-2. The third V-phase winding 46-V3 is wound around the fifth stator core teeth portion 32-5.

The W-phase winding has a plurality of windings. Specifically, as the W-phase winding, a first W-phase winding 46-W1, a second W-phase winding 46-W2, and a third W-phase winding 46-W3 are provided. The first W-phase winding 46-W1 is wound around the sixth stator core teeth portion 32-6. The second W-phase winding 46-W2 is wound around the ninth stator core teeth portion 32-9. The third W-phase winding 46-W3 is wound around the third stator core teeth 32-3.

The first stator core teeth portion 32-1 is composed of a first insulator teeth portion 42-1 of the lower insulator 25, a first insulator teeth portion of the upper insulator 24, and an insulating film disposed between the

insulators

24 and 25. (Not shown) and a third U-phase winding 46-U3 are wound. Therefore, the third U-phase winding 46-U3 is appropriately insulated from the first stator core teeth portion 32-1 by the upper insulator 24 and the lower insulator 25, and is appropriately insulated from the stator core 23. Further, the third U-phase winding 46-U3 is wound so as to be sandwiched between the first flange 43-1 of the lower insulator 25 and the outer peripheral wall 41, and the first flange of the upper insulator 24. And the outer peripheral wall portion. For this reason, the third U-phase winding 46-U3 is prevented from coming off from the first stator core teeth portion 32-1 toward the rotor 21 by the upper insulator 24 and the lower insulator 25;

Regarding other windings of the plurality of windings 46 that are different from the third U-phase winding 46-U3, the upper insulator 24 and the lower insulator 25 are appropriately insulated from the stator core 23 to prevent winding-over.

FIG. 6 is a developed view showing a plurality of windings 46 in the embodiment. As shown in FIG. 6, the first U-phase winding 46-U1 is wound counterclockwise around the fourth stator core teeth portion 32-4. The second U-phase winding 46-U2 is wound clockwise around the seventh stator core teeth portion 32-7. Third U-phase winding 46-U3 is wound counterclockwise around first stator core teeth 32-1. The first V-phase winding 46-V1 is wound counterclockwise around the eighth stator core teeth portion 32-8. Second V-phase winding 46-V2 is wound clockwise around second stator core teeth 32-2. Third V-phase winding 46-V3 is wound counterclockwise around fifth stator core teeth 32-5. The first W-phase winding 46-W1 is wound counterclockwise around the sixth stator core teeth portion 32-6. The second W-phase winding 46-W2 is wound clockwise around the ninth stator core teeth portion 32-9. The third W-phase winding 46-W3 is wound counterclockwise around the third stator core teeth 32-3.

The stator 22 includes a plurality of U-phase neutral lines 47-U1 to 47-U3, a plurality of V-phase neutral lines 47-V1 to 47-V3, and a plurality of W-phase neutral lines 47-W1 to 47-W3. And further comprising. The plurality of U-phase neutrals 47-U1 to 47-U3, the plurality of V-phase neutrals 47-V1 to 47-V3, and the plurality of W-phase neutrals 47-W1 to 47-W3 are a plurality of stator core teeth. The upper insulator 24 is located farther from the lower insulator 25 than the parts 32-1 to 32-9. In addition, since the lead side which is a power supply line is also arranged on the upper insulator 24 side, the upper insulator 24 side is also referred to as a lead side in this specification.

一端 One end of the first U-phase neutral wire 47-U1 is electrically connected to the first U-phase winding 46-U1. One end of first U-phase neutral wire 47-U1 is arranged on the first direction side (left side in FIG. 6) of fourth stator core teeth portion 32-4, and the other end is connected to fourth stator core teeth portion 32-4. 4 is disposed on the lead side farther from the insulator 25 below. One end of the second U-phase neutral wire 47-U2 is electrically connected to the second U-phase winding 46-U2. One end of second U-phase neutral wire 47-U2 is arranged on the first direction side of seventh stator core teeth portion 32-7, and the other end is arranged on the more lead side than seventh stator core teeth portion 32-7. Have been. One end of third U-phase neutral wire 47-U3 is electrically connected to third U-phase winding 46-U3. The third U-phase neutral wire 47-U3 has one end disposed on the first direction side of the first stator core teeth portion 32-1 and the other end disposed on the lead side with respect to the first stator core teeth portion 32-1. Have been.

The plurality of V-phase neutral lines 47-V1 to 47-V3 include a first V-phase neutral line 47-V1, a second V-phase neutral line 47-V2, and a third V-phase neutral line 47-V3. Have. One end of first V-phase neutral wire 47-V1 is electrically connected to first V-phase winding 46-V1. One end of the first V-phase neutral wire 47-V1 is arranged on the first direction side of the fifth stator core teeth portion 32-5, and the other end is arranged on the more lead side than the fifth stator core teeth portion 32-5. Have been. One end of the second V-phase neutral wire 47-V2 is electrically connected to the second V-phase winding 46-V2. One end of second V-phase neutral wire 47-V2 is arranged on the first direction side of second stator core teeth portion 32-2, and the other end is arranged on the more lead side than second stator core teeth portion 32-2. Have been. One end of the third V-phase neutral wire 47-V3 is electrically connected to the third V-phase winding 46-V3. One end of third V-phase neutral wire 47-V3 is arranged on the first direction side of fifth stator core teeth portion 32-5, and the other end is arranged on the more lead side than fifth stator core teeth portion 32-5. Have been.

The plurality of W-phase neutral lines 47-W1 to 47-W3 include a first W-phase neutral line 47-W1, a second W-phase neutral line 47-W2, and a third W-phase neutral line 47-W3. Have. One end of the first W-phase neutral wire 47-W1 is electrically connected to the first W-phase winding 46-W1. One end of the first W-phase neutral wire 47-W1 is arranged on the first direction side of the sixth stator core teeth portion 32-6, and the other end is arranged on the more lead side than the sixth stator core teeth portion 32-6. Have been. One end of the second W-phase neutral wire 47-W2 is electrically connected to the second W-phase winding 46-W2. One end of the second W-phase neutral wire 47-W2 is arranged on the first direction side of the ninth stator core teeth portion 32-9, and the other end is arranged on the more lead side than the ninth stator core teeth portion 32-9. Have been. One end of the third W-phase neutral wire 47-W3 is electrically connected to the third W-phase winding 46-W3. The third W-phase neutral wire 47-W3 has one end located on the first direction side of the third stator core teeth portion 32-3 and the other end located on the lead side with respect to the third stator core teeth portion 32-3. Have been.

The stator 22 includes a plurality of U-phase power lines 48-U1 to 48-U3, a plurality of V-phase power lines 48-V1 to 48-V3, and a plurality of W-phase power lines 48-W1 to 48-W3. In addition.

One end of each of the plurality of U-phase power supply lines 48-U1 to 48-U3 is disposed on the lead side of the first stator core tooth part 32-1 and one end thereof is located on the second direction side of the first stator core tooth part 32-1. (Right side in FIG. 6). The other end of the first U-phase power line 48-U1 is electrically connected to the first U-phase winding 46-U1. The other end of the second U-phase power supply line 48-U2 is electrically connected to the second U-phase winding 46-U2. The other end of third U-phase power supply wire -U3 is electrically connected to third U-phase winding 46-U3.

The first U-phase power line 48-U1 further includes a first U-phase crossover portion 49-U1 partially passing through the plurality of slits 44 of the outer peripheral wall 41 of the lower insulator 25. The first U-phase connecting wire portion 49-U1, which is a part of the first U-phase power line 48-U1, is arranged along the outer peripheral surface of the outer peripheral wall 41 of the lower insulator 25. The second U-phase power line 48-U2 further includes a second U-phase crossover portion 49-U2, partly passing through the plurality of slits 44 of the outer peripheral wall portion 41 of the lower insulator 25. A second U-phase crossover wire portion 49-U2, which is a part of the second U-phase power line 48-U2, is arranged along the outer peripheral surface of the outer peripheral wall 41 of the lower insulator 25.

One end of each of the plurality of V-phase power supply lines 48-V1 to 48-V3 is disposed on the lead side of the fifth stator core tooth part 32-5, and one end thereof is located on the second direction side of the fifth stator core tooth part 32-5. Are located in The other end of first V-phase power supply line -V1 is electrically connected to first V-phase winding 46-V1. The other end of second V-phase power supply line -V2 is electrically connected to second V-phase winding 46-V2. The other end of the third V-phase power supply line -V3 is electrically connected to the third V-phase winding 46-V3.

The first V-phase power supply line -V1 further includes a first V-phase crossover line portion 49-V1 partially passing through the plurality of slits 44 of the outer peripheral wall portion 41 of the lower insulator 25. The first V-phase crossover portion 49-V1, which is a part of the first V-phase power supply line -V1, is arranged along the outer peripheral surface of the outer peripheral wall portion 41 of the lower insulator 25. The second V-phase power supply line -V2 further passes through a plurality of slits 44 of the outer peripheral wall portion 41 of the lower insulator 25, and includes a second V-phase crossover portion 49-V2. The second V-phase crossover portion 49-V2, which is a part of the second V-phase power supply line -V2, is arranged along the outer peripheral surface of the outer peripheral wall 41 of the lower insulator 25.

One end of each of the plurality of W-phase power supply lines 48-W1 to 48-W3 is disposed on the lead side of the third stator core tooth part 32-3, and one end thereof is located on the second direction side of the third stator core tooth part 32-3. Are located in The other end of first W-phase power supply line -W1 is electrically connected to first W-phase winding 46-W1. The other end of second W-phase power supply wire -W2 is electrically connected to second W-phase winding 46-W2. The other end of third W-phase power supply line -W3 is electrically connected to third W-phase winding 46-W3.

The first W-phase power supply line -W1 further includes a first W-phase crossover portion 49-W1 partially passing through the plurality of slits 44 of the outer peripheral wall portion 41 of the lower insulator 25. A first W-phase crossover portion 49-W1, which is a part of the first W-phase power supply line -W1, is disposed along the outer peripheral surface of the outer peripheral wall portion 41 of the lower insulator 25. The second W-phase power supply line -W2 further passes through a plurality of slits 44 of the outer peripheral wall portion 41 of the lower insulator 25, and includes a second W-phase crossover portion 49-W2. A second W-phase crossover portion 49-W2, which is a part of the second W-phase power supply line -W2, is arranged along the outer peripheral surface of the outer peripheral wall 41 of the lower insulator 25.

FIG. 7 is a connection diagram showing a connection state of a plurality of windings 46 in the embodiment. The three-phase motor in the embodiment is a motor having a star connection in which the windings 46 are connected in parallel. The stator 22 further includes a plurality of neutral points as shown in FIG. The plurality of neutral points are arranged on the lead side of the plurality of stator core teeth portions 32-1 to 32-9, and include a first neutral point 51-1, a second neutral point 51-2, and a third neutral point. It has a point 51-3. The first neutral point 51-1, the second neutral point 51-2, and the third neutral point 51-3 are electrically insulated from each other.

One end of first U-phase winding 46-U1 is electrically connected to first neutral point 51-1 via first U-phase neutral wire 47-U1, and the other end is first U-phase power supply line 48. -It is electrically connected to the U-phase power supply via U1. One end of the second U-phase winding 46-U2 is electrically connected to the second neutral point 51-2 via the second U-phase neutral 47-U2, and the other end is connected to the second U-phase power supply 48. -It is electrically connected to the U-phase power supply via U2. One end of the third U-phase winding 46-U3 is electrically connected to the third neutral point 51-3 via the third U-phase neutral 47-U3, and the other end is a third U-phase power supply 48. -It is electrically connected to the U-phase power supply via U3.

One end of the first V-phase winding 46-V1 is electrically connected to the third neutral point 51-3 via the first V-phase neutral 47-V1, and the other end is the first V-phase power supply 48. It is electrically connected to a V-phase power supply via -V1. One end of the second V-phase winding 46-V2 is electrically connected to the first neutral point 51-1 via the second V-phase neutral line 47-V2, and the other end is connected to the second V-phase power supply line 48. It is electrically connected to a V-phase power supply via -V2. One end of the third V-phase winding 46-V3 is electrically connected to the second neutral point 51-2 via the third V-phase neutral line 47-V3, and the other end is connected to the third V-phase power supply line 48. It is electrically connected to a V-phase power supply via -V3.

One end of first W-phase winding 46-W1 is electrically connected to second neutral point 51-2 via first W-phase neutral 47-W1, and the other end is first W-phase power supply 48. -It is electrically connected to the W-phase power supply via W1. One end of the second W-phase winding 46-W2 is electrically connected to the third neutral point 51-3 via the second W-phase neutral 47-W2, and the other end is connected to the second W-phase power supply 48. -It is electrically connected to the W-phase power supply via W2. One end of the third W-phase winding 46-W3 is electrically connected to the first neutral point 51-1 via the third W-phase neutral 47-W3, and the other end is connected to the third W-phase power supply 48. -It is electrically connected to the W-phase power supply via W3.

[Method of manufacturing stator]
The stator 22 is manufactured using a winding machine by appropriately arranging a U-phase electric wire, a V-phase electric wire, and a W-phase electric wire on a stator core 23 to which an upper insulator 24 and a lower insulator 25 are appropriately attached. You. The electric wire is, for example, an enameled wire (an electric wire in which a copper wire is covered with an enamel coating). The winding machine includes, for example, a U-phase electric wire nozzle, a V-phase electric wire nozzle, and a W-phase electric wire nozzle. The nozzle for the U-phase electric wire, the nozzle for the V-phase electric wire, and the nozzle for the W-phase electric wire are fixed to each other. By properly moving the nozzle for the U-phase electric wire, the U-phase electric wire can be arranged at a predetermined position with respect to the stator core 23. By appropriately moving the nozzle for the V-phase electric wire, the V-phase electric wire can be arranged at a predetermined position with respect to the stator core 23. By appropriately moving the nozzle for the W-phase electric wire, the W-phase electric wire can be arranged at a predetermined position with respect to the stator core 23. In addition, the winding machine is not limited to the configuration of the present embodiment, and a machine having only one nozzle may be used.

First, the upper insulator 24, the lower insulator 25, and the stator core 23 to which an insulating film (not shown) is appropriately attached are set in the winding machine. By appropriately moving the nozzle for the U-phase electric wire, the winding machine arranges one end of the U-phase electric wire on the lead side of the first stator core teeth portion 32-1 and puts the U-phase electric wire into the first stator core teeth portion 32-1. 1 along the second direction, and passes through one of the plurality of slits 44. Next, the winding machine appropriately moves the nozzle for the U-phase electric wire so that the U-phase electric wire follows the outer peripheral surface of the outer peripheral wall portion 41 of the lower insulator 25, so that the first U-phase crossover portion 49 from the U-phase electric wire. Form U1. The winding machine further moves the U-phase electric wire nozzle appropriately to dispose the U-phase electric wire between one of the plurality of slits 44 and the fourth stator core teeth portion 32-4, so that the U-phase electric wire To form a first U-phase power supply line 48-U1. At this time, the winding machine forms the first V-phase power line 48-V1 from the V-phase electric wire by moving the nozzle for the V-phase electric wire and the nozzle for the W-phase electric wire in synchronization with the nozzle for the U-phase electric wire. A first W-phase power supply line 48-W1 is formed from the W-phase electric wires.

Next, the winding machine appropriately moves the nozzle for the U-phase electric wire and winds the U-phase electric wire counterclockwise around the fourth stator core teeth portion 32-4, so that the first U-phase winding from the U-phase electric wire is wound. Form 46-U1. At this time, the winding machine winds the V-phase electric wire counterclockwise around the eighth stator core teeth portion 32-8 by moving the nozzle for the V-phase electric wire in synchronization with the nozzle for the U-phase electric wire. A first V-phase winding 46-V1 is formed from the wires. The winding machine winds the W-phase electric wire around the sixth stator core teeth portion 32-6 in a counterclockwise direction by moving the W-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle. A 1W phase winding 46-W1 is formed.

Next, the winding machine moves the U-phase electric wire nozzle appropriately to move the U-phase electric wire from the first direction side of the fourth stator core tooth portion 32-4 to the lead side of the fourth stator core tooth portion 32-4. , A first U-phase neutral wire 47-U1 is formed from the U-phase electric wire. At this time, the winding machine forms the first V-phase neutral wire 47-V1 from the V-phase electric wire by moving the V-phase electric wire nozzle and the W-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle. Then, a first W-phase neutral wire 47-W1 is formed from the W-phase electric wire.

Next, the winding machine moves the U-phase electric wire nozzle appropriately to move the U-phase electric wire from the lead side of the seventh stator core teeth portion 32-7 to the first direction side of the seventh stator core teeth portion 32-7. , A second U-phase neutral wire 47-U2 is formed from the U-phase electric wire. At this time, the winding machine forms the second V-phase neutral wire 47-V2 from the V-phase electric wire by moving the V-phase electric wire nozzle and the W-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle. Then, a second W-phase neutral wire 47-W2 is formed from the W-phase electric wire.

Next, the winding machine appropriately moves the nozzle for the U-phase electric wire and winds the U-phase electric wire clockwise around the seventh stator core teeth portion 32-7 to thereby rotate the U-phase electric wire from the U-phase electric wire to the second U-phase winding 46. Form U2. At this time, the winding machine winds the V-phase electric wire around the second stator core teeth part 32-2 by moving the V-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle, and To form a second V-phase winding 46-V2. The winding machine winds the W-phase electric wire around the ninth stator core teeth portion 32-9 by moving the W-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle, and moves the W-phase electric wire from the W-phase electric wire to the second W The phase winding 46-W2 is formed.

Next, the winding machine appropriately moves the nozzle for the U-phase electric wire so as to pass the U-phase electric wire through one of the plurality of slits 44 and along the outer peripheral surface of the outer peripheral wall portion 41, so that the U-phase electric wire becomes The 2U phase crossover portion 49-U2 is formed. The winding machine further moves the U-phase electric wire nozzle appropriately and arranges the U-phase electric wire through one of the plurality of slits 44 on the lead side of the first stator core teeth portion 32-1 to thereby provide the U-phase electric wire. To form a second U-phase power supply line 48-U2. At this time, the winding machine forms the second V-phase power line 48-V2 from the V-phase electric wire by moving the V-phase electric wire nozzle and the W-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle. , A second W-phase power line 48-W2 is formed from the W-phase electric wires.

Next, the winding machine moves the U-phase electric wire nozzle appropriately to move the U-phase electric wire from the lead side of the first stator core teeth portion 32-1 to the second direction side of the first stator core teeth portion 32-1. To form the third U-phase power line 48-U3 from the U-phase electric wire. At this time, the winding machine forms the third V-phase power supply line 48-V3 from the V-phase electric wire by moving the V-phase electric wire nozzle and the W-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle. , A third W-phase power line 48-W3 is formed from the W-phase electric wires. The first connection terminal 50-1 is connected to one end of the bundle of the plurality of U-phase power lines 48-U1 to 48-U3, and the plurality of V-phase power lines 48-V1 to 48-V3 are connected to one. The second connection terminal 50-2 is connected to one end of the bundle, and the third connection terminal 50-3 is connected to one end of the plurality of W-phase power lines 48-W1 to 48-W3. (See FIG. 2).

Next, the winding machine appropriately moves the nozzle for the U-phase electric wire and winds the U-phase electric wire around the first stator core teeth portion 32-1 in a counterclockwise direction. Form 46-U3. At this time, the winding machine moves the V-phase electric wire nozzle around the fifth stator core teeth portion 32-5 in a counterclockwise direction by moving the V-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle. A third V-phase winding 46-V3 is formed from the wires. The winding machine winds the W-phase electric wire counterclockwise around the third stator core teeth 32-3 by moving the W-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle. A 3W phase winding 46-W3 is formed.

Next, the winding machine moves the U-phase electric wire nozzle appropriately to move the U-phase electric wire from the first direction side of the first stator core teeth portion 32-1 to the lead side of the first stator core teeth portion 32-1. To form a third U-phase neutral wire 47-U3 from the U-phase electric wire. At this time, the winding machine forms the third V-phase neutral wire 47-V3 from the V-phase electric wire by moving the V-phase electric wire nozzle and the W-phase electric wire nozzle in synchronization with the U-phase electric wire nozzle. Then, a third W-phase neutral wire 47-W3 is formed from the W-phase electric wire.

(6) By winding as described above, the third U-phase winding 46-U3 has both the winding start portion and the winding end portion disposed on the lead side as shown in FIGS. On the other hand, the first U-phase winding 46-U1 and the second U-phase winding 46-U2 start to be wound from the non-lead side and end at the lead side. Therefore, the number of windings of the third U-phase winding 46-U3 is different from the number of windings of the first U-phase winding 46-U1, and the second U-phase winding 46-U2 is wound. The number of turns is different. The first U-phase winding 46-U1 and the second U-phase winding 46-U2 have different lengths in which the U-phase power supply line connected to the U-phase power supply is routed. In other words, the first U-phase winding 46-U1 to the third U-phase winding 46-U3 have different windings including the number of windings and the length of the power supply line. For this reason, the length of the electric wire from the neutral point 51-1 to the U-phase power supply wire is equal to each of the first U-phase winding 46-U1, the second U-phase winding 46-U2, and the third U-phase winding 46-U3. And the impedance is also different.

The first U-phase neutral line 47-U1 and the second U-phase neutral line 47-U2 are disconnected, the first V-phase neutral line 47-V1 and the second V-phase neutral line 47-V2 are disconnected, and the first W The phase neutral line 47-W1 and the second W-phase neutral line 47-W2 are cut off. The end of the first U-phase neutral line 47-U1, the end of the second V-phase neutral line 47-V2, and the end of the third W-phase neutral line 47-W3 form a plurality of windings without peeling off the coating of the electric wire. Are electrically connected by a connector that can be electrically connected (hereinafter, referred to as a connector).

As the connection member, for example, a first splice terminal 52-1 as shown in FIG. 8 is used. FIG. 8 is a perspective view showing a state before connection of the first splice terminal 52-1 and the electric wire in the embodiment. In this embodiment, the end of the first U-phase neutral line 47-U1, the end of the second V-phase neutral line 47-V2, and the end of the third W-phase neutral line 47-W3 connect to the first splice terminal 52-1. The first neutral point 51-1 is formed by being joined to each other by crimping and electrically connected to each other. As shown in FIG. 8, the three electric wires (neutral wires) are stably bundled in contact with each other. The first splice terminal 52-1 as a connection member can be electrically connected to each other by bonding three wires by crimping so as to wrap the bundled wires. When the electric wire group is crimped by the first splice terminal 52-1, the coating film of each electric wire is peeled off by the uneven portion of the first splice terminal 52-1 and the three electric wires are joined. The number of electric wires bundled by the connecting member is not limited to three. That is, the number of wires to be bundled is not limited as long as the wires can be joined to each other by crimping and electrically connected to each other.

Similarly, the end of the second U-phase neutral line 47-U2, the end of the third V-phase neutral line 47-V3, and the end of the first W-phase neutral line 47-W1 are connected via the second splice terminal 52-2. The second neutral point 51-2 is formed by being joined to each other by crimping and electrically connected to each other. The end of the third U-phase neutral line 47-U3, the end of the first V-phase neutral line 47-V1, and the end of the second W-phase neutral line 47-W2 are crimped to each other by the third splice terminal 52-3. Are electrically connected to each other to form a third neutral point 51-3. Thus, the first neutral point 51-1, the second neutral point 51-2, and the third neutral point 51-3 can be easily formed.

[Operation of compressor]
The compressor 1 is provided as a component of a refrigeration cycle device (not shown), and is used to compress the refrigerant and circulate the refrigerant through a refrigerant circuit of the refrigeration cycle device. The three-phase motor 6 includes three U-phase power lines 48-U1 to 48-U3, a plurality of V-phase power lines 48-V1 to 48-V3, and a plurality of W-phase power lines 48-W1 to 48-W3. When a voltage is applied, a rotating magnetic field is generated. The rotor 21 is rotated by the rotating magnetic field generated by the stator 22. The three-phase motor 6 rotates the shaft 3 by rotating the rotor 21.

The compression unit 5 sucks the low-pressure refrigerant gas through the suction pipe 11 as the shaft 3 rotates, generates a high-pressure refrigerant gas by compressing the sucked low-pressure refrigerant gas, and raises the high-pressure refrigerant gas. It is supplied to the muffler room 16 and the lower muffler room 17. The lower muffler cover 15 reduces the pressure pulsation of the high-pressure refrigerant gas supplied to the lower muffler chamber 17 and supplies the high-pressure refrigerant gas with reduced pressure pulsation to the upper muffler chamber 16. The upper muffler cover 14 reduces the pressure pulsation of the high-pressure refrigerant gas supplied to the upper muffler chamber 16, and transmits the high-pressure refrigerant gas having the reduced pressure pulsation to the compression unit 5 and the three-phase motor 6 of the internal space 7. Is supplied through the compressed refrigerant discharge hole 18 to the space between the two.

The high-pressure refrigerant gas supplied to the space between the compression unit 5 and the three-phase motor 6 in the internal space 7 passes through a gap formed in the three-phase motor 6, and It is supplied to a space above the three-phase motor 6. The refrigerant supplied to the space above the three-phase motor 6 in the internal space 7 is discharged through the discharge pipe 12 to a device of the refrigeration cycle device disposed downstream of the compressor 1.

[Characteristic structure of compressor]
Next, a characteristic configuration of the three-phase motor 6 in the embodiment will be described. As described above, three U-phase neutral lines 47-U1 to 47-U3, three V-phase neutral lines 47-V1 to 47-V3, and three W-phase neutral lines 47-W1 to 47-W1 47-W3 (hereinafter also referred to as neutral line 47) is connected at each neutral point 51-1 to 51-3 (also referred to as neutral point 51). The features of the present embodiment include a structure for attaching nine neutral wires 47 to the stator 22.

The nine neutral lines 47 are formed by three first fixing portions 56 fixed to the stator 22 at a position closer to the winding portion 45 than the respective neutral points 51, and from each of the first fixing portions 56 to each neutral point And a second fixing portion 57 in which three sets of neutral lines 47 connected at each of the three neutral points 51 up to 51 are bundled. Each neutral point 51 side of the neutral wire 47 bundled by the second fixing portion 57 is covered with an insulating tube 58 as an insulating member, and the second fixing portion 57 is covered in the circumferential direction of the stator 22 ( It is inserted into the gap G between the winding portions 45 adjacent to each other (in the rotation direction of the rotor 21) (see FIG. 2).

[Main parts of stator manufacturing process]
The main part of the manufacturing process of the stator 22 of the three-phase motor 6 will be described. FIG. 9 is a flowchart for explaining a manufacturing process of the stator 22 in the embodiment. As shown in FIG. 9, by performing winding processing on the stator 22 as described above (step S1), each winding 46 is formed, and each electric wire supplied from each electric wire nozzle side is cut. (Step S2) One end (neutral wire 47) of each winding 46 is cut off from each wire nozzle side.

Subsequently, among the neutral wires 47 of the windings 46, the neutral wires 47 of the U-phase, V-phase, and W-phase are set as one set each, and the three neutral wires 47 are set to the upper insulator 24. And the three neutral wires 47 are fixed to each other at one place in the circumferential direction of the upper insulator 24 (in this embodiment, when the three neutral wires 47 are bundled together). The three neutral wires 47 are fixed to each other by the portion corresponding to the root of each neutral wire 47 being twisted (step S3), and the three neutral wires 47 are fixed to the stator 22. To form a first fixing portion 56 fixed to. In step S <b> 3, three sets of the neutral wires 47 are formed as one set of the three neutral wires 47 with respect to the nine neutral wires 47 respectively extended from the nine winding portions 45, thereby forming three sets of the neutral wires 47. Each of the neutral wires 47 is fixed by each of the three first fixing portions 56. Details of the step of forming the first fixing portion 56 will be described later.

Next, the three sets of neutral wires 47 extended from the first fixing portions 56 are cut at a predetermined length (step S4), so that the first fixing portions 56 of the three sets of neutral wires 47 are cut. From the same length. Subsequently, each of the three neutral wires 47 is joined by crimping via each of the splice terminals 52 (52-1 to 52-3) (Step S5), thereby forming each of the three neutral points 51. I do. Subsequently, the three sets of neutral wires 47 are bundled and the three sets of neutral wires 47 are fixed together (in this embodiment, the three sets of neutral wires 47 are twisted together in a bundled state). Thereby (step S6), the second fixing portion 57 in which the three sets of neutral wires 47 are bundled is formed. The details of the step of forming the second fixing portion 57 will be described later.

Next, the neutral wires 47 bundled together are inserted into the insulating tube 58 (step S7), so that the insulation of the entire neutral wires 47 extended from each winding portion 45 is ensured. You. Finally, the splice terminals 52 (neutral points 51) of the neutral wire 47 covered with the insulating tube 58 are housed in the gaps G between the adjacent winding portions 45 (step S8).

[Step of Forming First Fixed Part]
FIG. 10A is a plan view showing a state where nine neutral wires 47 are drawn out in the embodiment. FIG. 10B is a plan view illustrating a state in which the first fixing portion 56 is formed by three neutral wires 47 out of the nine neutral wires 47 in the example. FIG. 10C is a plan view illustrating a state in which the first fixing portion 56 is formed by three neutral wires 47 of the remaining six neutral wires 47 in the example. FIG. 10D is a plan view illustrating a state where the first fixing portion 56 is formed by the remaining three neutral wires 47 in the example. FIGS. 10A to 10D are top views of the stator 22 viewed from the upper insulator 24 side, and the winding portions 45 as nine slots are numbered 1 to 9 in a counterclockwise order.

As shown in FIG. 10A, three U-phase neutral lines 47-U1 to 47-U3, three V-phase neutral lines 47-V1 to 47-V3, and three W-phase neutral lines 47-U-47. Nine neutral wires 47 of W1 to 47-W3 are drawn out from the respective winding portions 45 of the stator 22. First, as shown in FIGS. 10A and 10B, of the nine neutral wires 47, a V-phase neutral wire 47-V2 drawn from each of the winding portions 45 of Nos. 2, 3, and 4 in the drawing. , W-phase neutral line 47-W3 and U-phase neutral line 47-U1 are extended along the outer peripheral surface of the upper insulator 24 and twisted with each other in the vicinity of the winding portion 45 of No. 7, for example. A first fixing portion 56 having a root fixed to the neutral wire 47 is formed. At this time, of the three neutral lines 47, the V-phase neutral line 47-V2 is extended clockwise, and the W-phase neutral line 47-W3 and the U-phase neutral line 47-U1 are rotated counterclockwise. And the three neutral wires 47 are twisted with each other.

That is, in the first fixing portion 56, the neutral wire 47 extending toward one side in the circumferential direction of the upper insulator 24 and the neutral wire 47 extending toward the other side in the circumferential direction of the upper insulator 24 47 are twisted and fixed to each other. The amount of twisting of the three neutral wires 47 is preferably, for example, about three rotations, and is such that the three neutral wires 47 are temporarily fixed (temporarily fixed) in the circumferential direction of the upper insulator 24. This makes the fixing work easy. By routing the three neutral wires 47 as described above, the neutral wires 47 extending to one side and the other side in the circumferential direction of the insulator 24 are formed so as to be mutually pulled with the insulator 24 interposed therebetween. Therefore, tension is applied to the neutral wire 47 extending from the winding portion 45 to the first fixing portion 56, and the neutral wire 47 is fixed to the insulator 24. Of the three neutral wires 47, the neutral wire 47 extending clockwise and the neutral wire 47 extending counterclockwise are not limited to the above-described combination. For example, the upper insulator It may be changed as appropriate in accordance with the position where the first fixing portion 56 is formed in the circumferential direction of the 24.

Subsequently, similarly to the above-described first fixing portion 56, as shown in FIGS. 10B and 10C, among the remaining six neutral wires 47, each of the winding portions Nos. 5, 6, and 7 in the drawing The V-phase neutral line 47-V3, the W-phase neutral line 47-W1 and the U-phase neutral line 47-U2 drawn out from 45 are extended along the outer peripheral surface of the upper insulator 24, and a winding portion of No. 7 By twisting each other near 45, a first fixing portion 56 to which three neutral wires 47 are fixed is formed. At this time, of the three neutral lines 47, the V-phase neutral line 47-V3 is extended clockwise, and the W-phase neutral line 47-W1 and the U-phase neutral line 47-U2 are counterclockwise. And three neutral wires 47 are twisted with each other.

Subsequently, similarly to the above-described first fixing portion 56, as shown in FIGS. 10C and 10D, among the remaining three neutral wires 47, each of the winding portions No. 8, No. 9 and No. 1 in the drawing The V-phase neutral line 47-V1, the W-phase neutral line 47-W2, and the U-phase neutral line 47-U3 drawn from 45 are extended along the outer peripheral surface of the upper insulator 24, and a winding portion of No. 7 By twisting each other near 45, a first fixing portion 56 to which three neutral wires 47 are fixed is formed. At this time, of the three neutral lines 47, the V-phase neutral line 47-V1 and the W-phase neutral line 47-W2 are extended clockwise, and the U-phase neutral line 47-U3 is rotated counterclockwise. And three neutral wires 47 are twisted with each other.

ＤAs shown in FIG. 10D, three neutral wires 47 are drawn out of the three first fixing portions 56 with three neutral wires 47 as one set. The three first fixing portions 56 are arranged close to each other in the circumferential direction of the stator 22, and can easily perform the operation of twisting three sets of neutral wires 47 described later. Note that the configuration is not limited to the configuration in which the three neutral wires 47 are routed as one set as described above, and at least two neutral wires 47 are opposite to each other (clockwise and counterclockwise) depending on the structure of the motor. ).

Since the stator 22 has the first fixing portion 56, the nine neutral wires 47 can be fixed to the upper insulator 24. For example, during the assembly work, the neutral line 47 extends along the outer peripheral surface of the insulator 24. The movement of the sex line 47 can be suppressed. In addition, since the stator 22 has the first fixing portion 56, the roots of the three neutral wires 47 connected at the neutral point 51 are fixed, so that one set of three neutral wires 47 is formed. As a result, it is possible to easily perform the work of connecting at the neutral point 51.

[Step of Forming Second Fixed Part]
FIG. 11A is a side view showing a state in which the lengths of three sets of neutral wires 47 are aligned in the embodiment. FIG. 11B is a side view showing a state in which three sets of neutral wires 47 are joined by crimping in the example. As shown in FIG. 11A, three sets of neutral wires 47 extended from each of the three first fixing portions 56 have the same length from the first fixing portions 56 by cutting one end. By forming the first fixing portion 56, the lengths of the neutral wires 47 can be easily made uniform. Subsequently, as shown in FIG. 11B, bonding is performed by crimping via a splice terminal 52 for each of the three neutral wires 47. Since the three neutral wires 47 are grouped together in the first fixing portion 56, when the U-phase, V-phase, and W-phase neutral wires 47 are joined via the splice terminal 52, The phases to be connected can be prevented from being erroneously joined, and the workability of assembly can be improved.

FIG. 11C is a side view showing a state in which three sets of neutral wires 47 are combined into one bundle in the example. FIG. 11D is a side view showing a state in which the neutral wires 47 bundled together are covered with the insulating tube 58 in the embodiment. As shown in FIG. 11C, by twisting the three sets of neutral wires 47, the second fixing portion 57 integrated into one bundle is formed. By forming the second fixing portion 57, the tension acting on the neutral wire 47 routed along the outer peripheral wall portion 41 of the upper insulator 24 is further increased, and the stator 22 during the operation of the compressor 1 is increased. The movement of the neutral wire 47 due to vibration is suppressed.

In the present embodiment, three sets of neutral wires 47 are bundled together and twisted up to the splice terminal 52 (neutral point 51) to form the second fixing portion 57. The structure is not limited to the structure, and only a part of the three sets of neutral wires 47 combined into one bundle may be twisted to form the second fixing portion 57.

Subsequently, as shown in FIG. 11D, the second fixing portion 57 and the splice terminal 52 in which the three sets of neutral wires 47 are gathered are covered with the insulating tube 58, so that the neutral point 51 is shifted from the first fixing portion 56. Insulated over Since the three sets of neutral wires 47 are combined into one bundle by the second fixing portion 57, the three sets of neutral wires 47 can be collectively insulated by one insulating tube 58 without individually insulating the three sets of neutral wires 47. This makes it possible to suppress an increase in manufacturing cost. As shown in FIG. 2, the second fixing portion 57 covered with the insulating tube 58 passes through the slit 44 as a notch from the outer peripheral side of the upper insulator 24 and passes through a gap G between the adjacent winding portions 45. Has been inserted.

The second fixed portion 57 is inserted into the gap G between the winding portions 45 on the outer circumferential side of the stator 22 in the radial direction, and interference with the rotor 21 is suppressed. Further, the second fixing portion 57 is inserted along the central axis direction of the stator 22, that is, along the vertical direction of the compressor 1. The neutral point 51 side of the insulating tube 58 is formed in a flat band shape, and the flat insulating tube 58 is inserted along the center axis direction of the stator 22 so that refrigerant or refrigeration passing through the gap G is formed. The flow resistance of the machine oil is suppressed. Thus, the flow rate of the refrigerating machine oil passing through the gap G is suppressed from increasing, and the amount of the refrigerating machine oil discharged to the outside of the compressor 1 can be suppressed.

As described above, in the winding 46 of the three-phase motor 6 of the embodiment, the plurality of neutral wires 47 are fixed to each other at a position closer to the winding part 45 than the plurality of neutral points 51. A portion 56 and a second fixing portion 57 to which a plurality of neutral lines 47 are fixed to each other between the plurality of first fixing portions 56 and the plurality of neutral points 51. For example, as compared with a case where nine neutral wires 47 are joined by soldering, three neutral wires 47 connected at the neutral point 51 are fixed to each other by the first fixing portion 56 as one set, and Since the three neutral wires 47 are fixed to each other by the second fixing portion 67, the nine neutral wires 47 can be easily handled, and the combination of the three neutral wires 47 can be connected in a predetermined combination. Mistakes can be prevented. Therefore, the workability of assembling the three-phase motor 6 can be improved, and the efficiency of the assembling work can be increased.

In addition, by twisting the three sets of neutral wires 47 fixed by the first fixing portion 56, the neutral wires 47 can be twisted in a state where the neutral wires 47 are regulated by the first fixing portion 56. For example, as compared with a case where nine neutral wires 47 not fixed by the first fixing portion 56 are bundled and twisted, the operation of twisting the nine neutral wires 47 becomes easier, and The second fixing portion 57 in which the sex wires 47 are bundled can be easily formed.

Further, the plurality of first fixing portions 56 in the three-phase motor 6 of the embodiment are configured such that the neutral wires 47 extending along the circumferential direction of the stator 22 are twisted, so that the neutral wires 47 are It is twisted and fixed. This makes it possible to easily temporarily fix the plurality of neutral wires 47 to the stator 22.

In addition, the plurality of first fixing portions 56 in the three-phase motor 6 of the embodiment are arranged close to each other in the circumferential direction of the stator 22. This makes it easy to twist a plurality of sets of neutral wires 47 extended from the first fixing portion 56 into a single bundle, so that the second fixing portion 57 can be easily formed. Further, it is possible to easily align the lengths of the neutral lines 47 from the first fixing portion 56 to the neutral point 51 and cut the neutral lines 47.

In the plurality of first fixing portions 56 of the three-phase motor 6 of the embodiment, the neutral wire 47 extending toward one side in the circumferential direction of the upper insulator 24 and the other side in the circumferential direction of the upper insulator 24 are provided. Neutral wire 47 extending toward is twisted and fixed to each other. Thereby, neutral wire 47 can be easily fixed to upper insulator 24.

In the second fixed portion 57 of the three-phase motor 6 of the embodiment, a plurality of sets of neutral wires 47 connected at each of the plurality of neutral points 51 are twisted in a bundle. This makes it possible to easily form the second fixing portion 57 in which the plurality of neutral wires 47 are bundled.

The second fixing portion 57 of the three-phase motor 6 according to the embodiment is covered with the insulating tube 58 and inserted into the gap G between the adjacent winding portions 45. Accordingly, the movement of the second fixing portion 57 during use of the three-phase motor 6 is suppressed, and the second fixing portion 57 can be stably held by the gap G of the stator 22. Further, since the second fixing portion 57 is covered with the insulating tube 58, it is possible to collectively insulate the plural sets of neutral wires 47 as compared with the structure in which the plural sets of neutral wires 47 are individually insulated. Therefore, an increase in the manufacturing cost of the three-phase motor 6 can be suppressed.

The second fixed portion 57 of the three-phase motor 6 of the embodiment is inserted on the outer peripheral side of the gap G in the radial direction of the stator 22. Thus, interference between the second fixed portion 57 inserted into the gap G and the rotor 21 can be avoided.

The second fixing portion 57 of the three-phase motor 6 of the embodiment is inserted into the gap G between the adjacent winding portions 45 from the outer peripheral side of the upper insulator 24 through the slit 44. As a result, the second fixing portion 57 drawn from the first fixing portion 56 is supported by the slit 44, so that the second fixing portion 57 is prevented from moving with respect to the upper insulator 24, and is inserted into the gap G. The stability of the mounted state of the second fixing portion 57 can be further enhanced.

In the present embodiment, the three-phase motor is applied to the rotary compressor, but is not limited to the rotary compressor, and may be applied to a scroll compressor. In this embodiment, the first fixing portion 56 is formed by twisting a plurality of neutral wires 47, and the second fixing portion 57 is formed by twisting a plurality of sets of neutral wires 47. However, the present invention is not limited thereto, and the first fixing portion 56 and the second fixing portion 57 may be formed by a fixing member such as a binding device. In addition, the winding procedure of the winding 46 is not limited to the present embodiment. For example, the winding may be performed such that one winding is wound for each tooth.

1 compressor 3 shaft (rotary axis)
5 Compression section 6 Three-phase motor 21 Rotor 22 Stator 24 Upper insulator (insulator)
32-1 First stator core teeth section (teeth)
32-2 Second stator core teeth (teeth)
32-3 Third stator core teeth (teeth)
32-4 4th stator core teeth section (teeth)
32-5 Fifth stator core teeth part (teeth)
41 outer peripheral wall 44 slit (notch)
45 Winding part 46 (46-U1 to 46-U3) Plural U-phase windings 46 (46-V1 to 46-V3) Plural V-phase windings 46 (46-W1 to 46-W3) Plural W phases Winding 47 (47-U1 to 47-U3) Multiple U-phase neutral lines 47 (47-V1 to 47-V3) Multiple V-phase neutral lines 47 (47-W1 to 47-W3) Multiple W phases Neutral wire 48-U1 to 48-U3 Multiple U-phase power lines 48-V1 to 48-V3 Multiple V-phase power lines 48-W1 to 48-W3 Multiple W-phase power lines 49-U1 First U-phase crossover line Portion 49-U2 Second U-phase crossover 49-V1 First V-phase crossover 49-V2 Second V-phase crossover 49-W1 First W-phase crossover 49-W2 Second W-phase crossover 51 (51-51) 1 to 51-3) Neutral point 56 First fixing part 57 Second fixing part 52 (52- ) First splice terminal (connecting member)
52 (52-2) Second splice terminal (connection member)
52 (52-3) 3rd splice terminal (connection member)
58 Insulating tube (insulating member)
G gap

Claims

A rotor, and a stator for generating a magnetic field for rotating the rotor,
The stator is
With multiple teeth,
It has a winding part wound around each of the plurality of teeth, a neutral wire provided on one end side of the winding part, and a power supply line provided on the other end side of the winding part. Multiple windings,
And a plurality of neutral points where the plurality of neutral wires are electrically connected via a connection member,
The plurality of neutral lines are: a plurality of first fixing portions fixed to each other at a position closer to the winding portion than the plurality of neutral points; and the plurality of neutral points from the plurality of first fixing portions. And a second fixing portion in which the plurality of neutral wires are fixed to each other.
The plurality of first fixing portions are fixed to each other by twisting the neutral wires extended along the circumferential direction of the stator,
The motor according to claim 1.
The plurality of first fixing portions are arranged close to each other in a circumferential direction of the stator.
The motor according to claim 1.
The motor is a three-phase motor;
The plurality of neutral wires are joined by crimping via the connection member for each of the three neutral wires,
The motor according to any one of claims 1 to 3.
Further comprising an insulator fixed to both ends of the stator,
In the plurality of first fixing portions, a neutral wire extending toward one side in the circumferential direction of the insulator and a neutral wire extending toward the other side in the circumferential direction are twisted with each other. Fixed
The motor according to any one of claims 1 to 4.
The second fixed portion is a plurality of neutral wires connected at each of the plurality of neutral points are twisted together in a bundle,
The motor according to any one of claims 1 to 5.
The second fixing portion is covered with an insulating member, and is inserted into a gap between the adjacent winding portions.
The motor according to any one of claims 1 to 6.
The insulator has a notch that allows the outer peripheral side of the insulator to communicate with the winding portion,
The second fixing portion is inserted into the gap between the adjacent winding portions through the notch from the outer peripheral side of the insulator,
A motor according to claim 5.
A motor according to any one of claims 1 to 8,
A compression unit that compresses the refrigerant by rotating the rotation shaft of the rotor,
A compressor comprising: